Kendrick Tan designed Heiswap with Buterin’s minimal mixer specifications in mind, which was titled “A simple mixer for sending fixed quantities of ETH.” The mixer is currently available for use on Ethereum’s Ropsten Testnet at heiswap.exchange. In response to Kendrick’s announcement post on Twitter, Buterin said that Heiswap is a “cool project” created by a “random genius”.
https://beincrypto.com/software-engineer-launches-heiswap-an-ethereum-mixer-endorsed-by-vitalik-buterin/Haven't tried it though, so I'm not sure how this whole ethereum mixing is done or will it also be big as bitcoin mixing services around. So let's see how it goes in the next days or so.
Here is the official blog:
https://kndrck.co/posts/introducing_heiswap/ 
